/**
     * @Route("/change/email", name="user_dashboard_change_email")
     */
    public function changeEmailAction(Request $request)
    {
        $user = $this->getUser();
        if (!is_object($user) || !$user instanceof UserInterface) {
            throw new AccessDeniedException('This user does not have access to this section.');
        }

        $formEmail = $this->createForm(EmailFormType::class);
        $formEmail->handleRequest($request);

        if ($formEmail->isSubmitted() && $formEmail->isValid()) {

            $default = new MessageDigestPasswordEncoder('sha512', true, 5000);

            $encoderFactory = new EncoderFactory([
                User::class => $default
            ]);

            $data = $formEmail->getData();
            $encoder = $encoderFactory->getEncoder($user);
            $plainPass = $data['plainPassword'];
            $bool = $encoder->isPasswordValid($user->getPassword(), $plainPass, $user->getSalt());

            if ($bool){
                $this->addFlash(
                    'message','Twój adres email został zmieniony'
                );

                $user->setEmail($data['email']);
                $em = $this->getDoctrine()->getManager();
                $em-> flush();

                return $this->redirectToRoute('user_dashboard_change_pass');
            }
            $this->addFlash(
                'message','Błędne hasło!'
            );
            return $this->redirectToRoute('user_dashboard_change_pass');
        }
        $this->addFlash(
            'message','Wystąpił błąd.'
        );
        return $this->redirectToRoute('user_dashboard_change_pass');
    }